<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=\, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
      <!-- 声明循环值得变量 -->
      <ul>
        <li v-for="item in arr">
          {{item}}
        </li>
      </ul>
      <!-- 声明值 和 下标  变量 -->
      <ul>
        <li v-for="(item, index) in arr">
          {{item}}
          --->
          {{index}}
        </li>
      </ul>

      <!-- 循环对象 -->
      <ul>
        <li v-for="value in json">
          {{value}}
        </li>
      </ul>
      <ul>
        <li v-for="(value, key, index) in json">
          {{value}}
            -->
          {{key}}
          -->
          {{index}}
        </li>
      </ul>
    </div>
    <script src="./vue.global.js"></script>
    <script>
      const { createApp } = Vue;
      const app = createApp({
        data() {
          return {
            arr: ["a", "b", "c", "d"],
            json: {
              name: '小明',
              age: 18,
              gender: '男'
            }
          };
        },
      });
      app.mount("#app");
    </script>
  </body>
</html>
